Home / 142,638.84-196,852.68-78,982.56

Finding the Fourth Proportional to 142,638.84, 196,852.68 and 78,982.56

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Solution

The fourth proportional to 142,638.84, 196,852.68 and 78,982.56 is: 109,002.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,638.84 : 196,852.68 = 78,982.56 : x
  2. Step 2: Convert to fraction form
    142,638.84/196,852.68 = 78,982.56/x
  3. Step 3: Cross multiply
    142,638.84x = 196,852.68 × 78,982.56
  4. Step 4: Simplify right side
    142,638.84x = 15,547,928,609.26
  5. Step 5: Solve for x
    x = 15,547,928,609.26/142,638.84
  6. Step 6: Final answer
    x = 109,002.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.